Steam-actuated air injector



April 17, 1928. 1,666,136

' 1-. E. HARTER STEAM ACTUATED AIR INJECTOR Filed July 8. 1926 110 6EHa-riewr;

mentioned, is the" 'pres'ent lnvention;

Patented Apr. 17, 19 2 8.

.z umrso STATES-J; gr m-Y semen, or I H V PHANY, nrorrmonn, rnnIAnA, Aooltrottaa'ron oniritnrnnh,

, 'STEAM-AGTUATED Aria, INJ CTOR; r I

I, 1,666,135; ATENT:OFFR'QEfl-J I v A plicant filed ul 8, 192s. i-Serial No;. 121,25li j lt has been determined, scientifically, thatinorder. to obtain the best resultsandobtain the maximum amount of heatin the combus- 5 tlon of coal lIl furnaces that a certainamount ofsecondary air should beinjected over and.

in contact with the burning coal, thereby supporting the combustioninorder to ob-, tain the maximum amount of heat units therefrom and toeliminate soot and smoke,-

pthatg'is to say,-substituting the soot and smoke,"whicl1' is'ordinarilyproduced, for usable heat. Thereforetoovercome said ohjections, and toobtain the desirable results paramount object of my further; object istoprovide means for injecting air, under the. desired pressure and withasuitab'le carrying agent, into the combustion chamber of furnaces orthe like in Y F such manner asto obtain the highest degree of efliciencyand economy, i .tAnd "a further-object is to provide meansforaccomplishing said results in an economicali manner. by means not aconstructionwhich is, simple 'in' character, strong I and durable, inits several parts," easily operated and controlled, and which can bemanufactured, installed, and sold at, a. comparatively lowprice," Oneway ofcarrying out, the-prlnciplesof my invention in a practical and.eflicient' therear Walls thereof. 9

manner is shownin-the accompanying draw- 1ngs,'1n wh1ch-F1gure-1shows'my nven: tion in elevation as lnstalled inconnection With'afurnacewhich is shown, incentrztl vertical section taken through thefront andFigure 2 is-a centrallongitudinal,section,

taken; through, the several partsof myi-in-p vention proper showing thesame] in assembled cond tion. Figure 3 is an end elevationqoftheconcentric rings or cones as assembled. alone, with the parts integraltherewith; Figure 4is an exterior viewi-ot' the assembled parts of myinvention. Fig- 'ure -5- isxa horizontallongitudinal section of aportion of the mainior distributing nozzle the' corresponding partsshown in Fig; 4;.

assembly, "being a slight modification from And F-igure 6 is: anoutsideview 'offthesteamg Similar indices denote like parts thronghf"out/the several views.)

:Inorder that the construction, the, opera.-

ition; andithe several advantages-of my in- E i s locatedgi M v ;.s

All, of said parts are -shownvime'relyftog ,3, substantially as shown 2tov the' A, AssIeNoR T0 onovvn FUEL sAv'EnooMg be more fully understoodand; v: pr edii W new t e 1 1 a d a e description thereof, in which Iwilljsetfforth r the, same as oomprehensivelyas I N Referring now mule)dr win s in detail Letter A:.indicates the" front wallf ovfia fil Imace, and B denotes' 'the" rearwall of the notesthe furnace-grate, the 1same Letter. '0 denotes the top,.and D de make clear ,the'application ofmyv invention" j in connection therewith.v

The invent on proper includes i3; concentric r ng or cone assembly,which icon;

sists oflaplurality of conefs'hapedfri'ngs 1,

'2 and "3, wl1ich.--are of varying vdimensions I With relation. to" eachother. The 'small'er:

end portion or the ring -1'is,-1ocatec1in}the" ring 2, b ut,;notLinlcontact therewith; Like wisethe' smaller end portion of the ring2'Q'is located in therewith, v p a The ring, integrally connected withthe ring 3 by" the, two, oppositely directed ribs Likewiselthe ring 2and the, ring 1 ;the rin g' a, but isnot in c'ontact so a are connectedby the ribs 5'. By the above 1 it will beseenthat the rings 1, and 3 arenested together, iyet. without contact with each. other, "there being'Qair-intake' spaces formed therebetweenf Located concentric and flushwith the larger end 'o fthe ring l'is the disc 6, shown in Fig. "3,which'is' inte grally connected with the ring 1 by the ribs 7.. jAl'laperture 8 is :formed'through the center of the "disc 6, and it isinteriorly threaded, for the "purpose hereinafter set forth. ,1 H i fThe smaller end of, the 1 ring 3 terminates in aicollar 9, whiclijisoffset outwardto form a shoulderat the junctureof the ring 3 with saidcollar 9 for the purp s h rein t re forth .,,,11 j

y The mainjnozzle assembly comprises tein-"r paratively large and hollowstem 10, one end of which fits snugly in the collar 9 and contacts withsaid shoulder whereby the'inside diameter of the stem 10 is equal withtheji nf side diameter of the smaller, end of he, ring The stemflOisfdeta'chably; seciire gP referably wformed'f-integral withgand nozzle11, which is flattened and formed flaring, in order to provide acomparatively long and narrow discharge slot 12.

Gonneeting h p and b ttom port on of the nozzle ll is a dividing pier18, which is shown in Figs. 2 and 4: as diamond shape, in cross section.In some instances the pier is formed curved, as the pier 1a shown inFig. 5, in which latter instance the nozzle is usually longer on oneside than on the other, for the purpose hereinafter explained, the samebeing indicated bythe nozzle 16 which is shown'in Figi.

The steam-jet nozzle, shown alone in Fig. 6, consists' of threeportions, whiclrare'integra'l witheach other: Thecentral disc portion 17which is adaptedto contact flat with the disc 6; th exteriorly threadednose 18,

which is adapted to run "into the aperture 8' I and the larger,exteriorlythreaded, stem 19 adapted to havefa' pipe fitting, as an elbowor a T- fitting, run thereon, as hereinatterexplained.

Formedcentrally and longitudinally where i is retained by threads;

"' throughsaid steam-jet nozzle iean aperture 20, Thatfportion of theaperture I is near the end of the nose"l8 being formed 20 which lessdiameter than isthe remainder thereof, s indicated in Fig. 2.

' Inthis instance a T-fitting 21 1s threaded onto the stem 19. Threadedonto; the second br'ancho'f the fitting 21 is an L-fitting' -22, wh chis c nnect d vto the te m, upply pip 23', which latter in turn isconnected'with a "uitable stea immaterial to-an understanding of this inventiiin." I Where two or more of my devices are emplayed n a e ur ace ap pe o frornthe third bfanch of the fitting, 21 to the secohdfor thethird device, 'so that all'rn'ay be supplied by the same pipe 23.However where only oneof my dev'icesis employed then the pipe 24; may bedispensed witlrand the third branch off'the fitting 21 should beplugged, or: the fitting 22 may be connected directly to the stem 19. a

Numeral 25 denotes a cut-off valve, where by theisteam maybe turnedon oroff at will, I However in practice I usually provide a valveconstructionwvhich operates automatically with the opening and closingof th fu n ce door, ut is s e al to an understanding of my presentinvention. In practice znydevice shouldbe disposed at anangle,'substantially as shown in'Fig. 1, being inserted through, orbuilt into the wall "A, and directed downward and inward, whereby theai'r'in issuing from the slot 12 will bedischarged 103 .61 the fuelEwhich is in the process of combustion at that time,

\Vhenever fresh 'fuel is placed'onthe fire carriedhy thegriate D thenthe verve 25 stan h pe e wh c w pe fi' e steam to "be discharged withconsiderable pply; no ho and 24 is extended force through the steamnozzle or nose 18,.

it is projectedthrough the rings successively expand and form suctionsthrough the spaces whereby a comparatively I between the rings, largevolume of air will be taken into the air discharge nozzle, and by reasonof the velocity imparted by the steam it will issue from the slot 12inthe form of a heavy air blanket whiclrwill cover practically all of thehorizontal extent of the interior of the combustion chamber into whichit is in- 'jected. i

For devices is required, in which case the air de livery nozzle'is ofthe shape shown in Fig. 4. But in large furnaces several ot my devicesmay be employed, as in a series, the same beingarranged in ahorizontal-row andparallel with each other. my injectors are employed ina'turnace then the two end air delivery nozzles should be asthat shownin Figure 5, whereby a portion of the'air from each will be directedmore 1 laterally, that is toward the lnner corners of the combustionchamber, thereby causing the injected air to be distributed over "agreater extent laterally of the interior of the combustion chamber.However the intermediate air delivery nozzles, that is those betweenthetwo end-air nozzles will be of the" shape of that shown in Figure 4,.

For convenience of description]: have em ployed herein the word steam,underpressure, as the preferable power for carrying the secondary airinto the furnace, however it is to be understood that I am not to. belimited thereto, as other carrying elements may be employed such, forinstance, as 0011 pressed-air.- t

The force and the suction created by the expanding steam' willmanifestly "cause out side air to be drawn in through'the larger openends of the rings or'cones 1, 2 3, successively, and carried by theforceof the steam into the stem 10, then into the air I chamber. I

The secondary air injectedinto. and-over the fuelunder combustion 'in'the furnace causes every part of the fuel, and the gases :1 small sizefurnace only one of my a usable heat,'and entirely dispensing with Ismoke, thereby greatly increasing the etfi- Tosummarize: I have found byexperience that my invention requires a comparatively small initialexpense for installation,

' and practicallyno expense for maintenance: orrepa1rs; it is aspermanent as the boller or the furnace With W hlChlt is used; it meetsall fire preventive ordinance and requirev ments; it dispenses withsmo-ke'and soot, and

the consequentcleaning of fines; it makes ipossible the use of a cheapergrade of fuel,

and requires a less amount of fuel to be used; it increases the draftand'causes steam to be raised more quickly; and it is adapted to be usedin various types of furnaces or combustion chambers and can be installedeither singlyor in multiple. I

i I desire that it be understood thatvarious changes maybe made in the"several details herein set forth Without'departing from the spirit ofthe invention or sacrificing any of the advantages thereof whichlare newand useful and which involve invention;

In testimony-whereof scribed my name. v r e K i 7 i1 HARTER;

my invention, what I claim "and desire to se cure by Letters-Patent ofthe United States, 'ciency of the :fuel and solving'the so called I Ismoke nuisance.

spaced apart and integrally, connected to form air inlets between eachtwo andflead ing from the outsideto the. interiors thereof, a steam jetnozzle concentric with said rings and adapted w direct a jet of steamthrough the centers of all of vsaid rings, means for desaid rings, ahollow stem connected to an-.

other one of said'rings. which is'most remote to the ring to which saidnozzle is con- H nected, an air discharge nozzle extending from theouter end oflsaid stem and formed I flattened and fan-shapedhorizontally witha e slot formed through-the end thereof for thedischargetheret-hrou'gh ofair, and a dividfing pier connecting the upperand the lower portions of said air discharge nozzle,

A secondary air injector, to beemployed I 1 in COIlllQOtlQIIWlth afurnace or the like, andv comprising a plurality of 'cone-shapedrmgs x35 I have hereunto sub- 4e tachably connecting said fno'zzle- With oneof.

